Separating grate for grain thrashers



F. R. FICK sEPARATIN GRATE Fon GRIN THRASHERS Filed Feb. 5, 1923 Feb. 115, 1927. '1,617,624

40 known type and thei'efore requires no spe- Patented Feb. 15,19227.

UNITED sraTEs PATENTOFFICE-f rani) iz. Ficx, or GAVA, Iowa.

SEPARATING'GRTEFOR GRAIN THRAsHERs.

Application filed VFebruary V1923. Serial No. 616,997.

Tliis iiivention relates to thrashing machines and particularly to a gratel construction which is designed to afford a, more efficientseparation of the grain when being thrashed. v i.

The advantages thru which the results I are obtained, as will beobserved upon referizo ' nei' of mounting the grate, and its relation to the thrashing cylinder;

Figure 2 is Va top perspect'ive view of the gi'ate removed from the machine;v

F igure 3 is a front perspective view of the forward section, and w Figure 4 is a perspective view of the check plat 7 In the present invention, the construction distinguishes, principally from the pror art, in that 'the bars of the grate ai'e ari'Va-nged in the direction of travel of the cylinder instead of ti'ansversely the-reof, which arrangenient perinits vof and results in'a more efficient separation of 'the grain. 'A In the -accompanying di'awing's I have shown generally at 2, 'the gi'a'te of asgrain thrashing machine, 4 illustrating a conventional form of cylinder, which intactual practice'may be of any preferred or well vo ific description. w The structure ,to be desci'ibed furtlier'in detail' is supported in the tlirashiiig machine frame in a manner. to be describe The grate structure vwhich also embodies the concave's at the forward part of the machine, coinprises a' forward con'cave 6, a plurality of adjoining .grate sections 8 .and

a rear upwardly inclined grate sectionl 10'.V

Each ofl these concave and grate sections is individual or independent and may be separably placed or removed When necessary.

. AS -distinguished from prior construction with said grate frame as' shown.

Viii'which the separating bars are ai'ranged transversely of the directioii. of movement ofthe cylinder, each of the grate sectionsis rectaiigular'in form and comprises a plui'alit-y of parallel longitudinalflat bars 9 set Vvertically in slotted transVerse-barsi 12 which are in turn supported upon transverseyokes 14, the upturned 'ends V16 ofv which are suitably mounted in the side members or ofthe thi'ashing machine frame. i. o

The .rearmost grate, which has been re-'i fei'r-ed to as being-upwardly and rearwardly plates inclined is constructed in armanner similarto the previously described Sections Vand is'V ba'cked bya vsheet metal check plate 20 Vspac-ed,ther'efroni and having foi'vwardly-eit-V` tending wino's which are suitably 'connect-ed.

By reference to Figure 1 of the'drawing it will be seen that the upper edges ofthe inclin-ed bars 10` lie in la plane spaced above the planerin, which the upper edges. of the cross bars lie and the lower edges of the inclined bars 10 are spaced above the inclined edges of Athe Wings. This'arrangement is such that there can beno return or i'ebound blast of air and which will ret-urn trasli or chaff to the incoming grain. air 'is defiected and passesvover the inclined edges of thewings and between the wings and the bars and cannotrebo'und'or return to the Volume of graiii which is being deposited upon the upper'surfaces ofthe 'edges of the inclined bars.

Havingdescribed my invention, what- -I claim as new is:

The blast of' A grain clieck adapt-ed to ben sed in con- Junction witha thrashei' cylinder and coiicaVe-coinpi'ising aplate havinga Vertical .intermediate portion and provided with side Vwings having inclined' edges, spaced cross bars iiiounted upon the inclin-ed -edges ofl the Wing and parallel spaced bars iiiounted upon the crossba'rs and inclined parallel with the inclined edges of the wings and having their lower edges spaced above theplane in which the inclined edges of the wings lie, tlieupper -edges of the'inclined bars lying iii a plane spaced above the plaiie in which the upper edges iof the cross bars lie.

ture.

p 'rann R. FioK.

Intestimony Vwhereof Iv aflix my signa- 

